How can I figure out how to solve this bug message?
I am trying to rewrite a Qt3 working code into Qt4 for converting IplImage to QImage and found the "right conversion types" however my code as below results in "ISO C++ forbids declaration of 'QImage' with no type" compile message.
QImage* convertIplImageToQImage(...){
...
QImage *qqImage;
if (this->data->nChannels == 1) {
QVector<QRgb> myColorTable;
for (int i = 0; i < 256; i++)
myColorTable.push_back(qRgb(i, i, i));
qqImage = new QImage(qImageBuffer, width, height,
QImage::Format_Indexed8);
} else {
qqImage = new QImage(qImageBuffer, width, height,
QImage::Format_RGB32);
}
return qqImage;
}
Check that you added #include to your cpp file.
I usually get this error if an include header is missing.
Related
I have 3 files in my project, main.cpp, Globals.h & Globals.cpp:
main.cpp
#include "Globals.h"
int main()
{
if (setup())return 1;//If setup fails terminate the program
CenterOrigin(playerSprite);
while (window.isOpen())
{
deltaTime = deltaClock.restart().asSeconds();
while (window.pollEvent(ev))
{
if (ev.type == sf::Event::Closed)window.close();
}
float rotSpeed = 5;
window.clear(sf::Color(12, 14, 12, 0.9 * 255));
window.display();
}
return 0;
}
Globals.h
#pragma once
#include <iostream>
#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>
#include <SFML/System.hpp>
#define TITLE "Belty McBelth"
#define WIDTH 1280
#define HEIGHT 720
sf::RenderWindow window;
sf::Font font;
sf::Event ev;
sf::Texture playerTex;
sf::Sprite playerSprite;
sf::Texture tieTex;
sf::Sprite tieSprite;
sf::Clock deltaClock;
float deltaTime; //Time since last frame in seconds
int setup();
void CenterOrigin(sf::Sprite & t);
Globals.cpp
#include "Globals.h"
int setup()
{
window.create(sf::VideoMode(WIDTH, HEIGHT), "Belty McBelth", sf::Style::Close);
if (!font.loadFromFile("../comic.ttf"))return 1;
if (!playerTex.loadFromFile("../PLAYER.png"))return 1;
playerSprite = sf::Sprite(playerTex);
std::cout << "Setup completed without errors \n";
return 0;
}
void CenterOrigin(sf::Sprite & t)
{
sf::FloatRect d = t.getLocalBounds();
t.setOrigin(d.width / 2, d.height / 2);
}
Whenever I try to build this project, I get a plethora of LNK2005 errors, one for each variable that is declared in the globals header file. I have searched for a solution to this problem, however I am not able to find one. I have ensured that there are no definitions in the globals.h file, however, I am still unable to build the project.
This problem solves itself if I move all the definitions into the .h file, however, through the microsoft page for the lnk2005 error, I have found that this is only because there is only one file that includes the globals header file.
Sidenote, is there any better way of handling global variables/functions? Extern is an option, but it gets too cumbersome when you have a lot of global variables.
I made a program using C++ and SFML. The program is supposed to generate 20 circles that are either red or blue, and it did work. Yet, I made a few changes, saved, and came back to it on VS a few hours later to find that I keep getting an error:
'{': No matching token found (Line 9)
I keep scanning through the code and I can't seem to find the issue at all.
Code:
#include <SFML/Graphics.hpp>
#include <iostream>
#include <chrono>
#include <random>
using namespace std;
int main()
{ //Line 9
unsigned seed = chrono::system_clock::now().time_since_epoch().count();
default_random_engine generator(seed);
uniform_int_distribution<int> distribution1(0, 1024);
uniform_int_distribution<int> distribution2(1, 2);
sf::RenderWindow window(sf::VideoMode(1024, 1024), "Spooky Circle Box");
sf::CircleShape shape(100.f);
shape.setFillColor(sf::Color::Red);
shape.setPosition(10, 10);
std::vector<sf::CircleShape> circles(20);
window.clear();
for (unsigned int i = 0; i < circles.size(); i++) {
int find = 0;
int find_color = 0;
while (find != 20) {
circles[i].setPosition(distribution1(generator), distribution1(generator));
for (unsigned int j = 0; j < circles.size(); j++) {
if (i == j || (circles[i].getPosition().x != circles[j].getPosition().x || circles[i].getPosition().y != circles[j].getPosition().y)) {
find++;
} else;
if (find != 20) {
find = 0;
} else;
}
find = 0;
find_color = distribution2(generator);
circles[i].setRadius(5.f);
if (find_color == 1) {
circles[i].setFillColor(sf::Color::Blue);
} else { circles[i].setFillColor(sf::Color::Red); }
window.draw(circles[i]);
}
window.display();
while (window.isOpen()) {
sf::sleep((sf::milliseconds(100)));
sf::Event event;
while (window.pollEvent(event))
{
if (event.type == sf::Event::Closed)
window.close();
}
}
return 0;
}
I explain further my comments, but I'm not going to post any repaired code. I only suggest a way of doing things.
By the structure of you're code, it seems you're trying to generate some blue or red circles randomly distributed over the window, but, at the same time, you're trying to draw them.
You should differentiate your actual data from your drawing stuff. My suggested pseudo-code would be.
int main(){int main(){
// 1 . Declare your circle vector
// 2 . Populate that vector with random circles (random position, random color)
// Now draw those circles
// 3 . while(window.isOpen()) loop
// 3.1 Clear the window
// 3.2 Draw your circles
// 3.3 Display the stuff
}
That point 3 it's basically the way to draw stuff acording SFML tutorials.
I've been having an awfully strange problem that I cannot seem to grasp. I'm almost convinced that this is a compiler bug.
xTech : xIncludes.hh
#ifndef _xIncludes_
#define _xIncludes_
#define SDL_MAIN_HANDLED
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdint.h>
#include <vector>
#include <SDL2/SDL.h>
#if defined _WIN32
#include <winsock.h>
#endif
#endif
xTech : xSound.cc
#include "xSound.hh"
int xOGGStreamSource::_stream(ALuint Buffer) {
char data[BufferSize];
int size = 0;
int section;
int result;
while (size < BufferSize) {
result = ov_read(&_oggstream, data + size, BufferSize - size, 0, 2, 1, §ion);
if (result > 0)
size += result;
else
if (result < 0)
return result;
else
break; //This seems a little redundant.... deal with it after it works.
}
if (size == 0) return 0;
alBufferData(Buffer, _format, data, size, _vorbisinfo->rate);
return 1;
}
void xOGGStreamSource::_empty() {
int queued;
alGetSourcei(_source, AL_BUFFERS_QUEUED, &queued);
while (queued--) {
ALuint Buffer;
alSourceUnqueueBuffers(_source, 1, &Buffer);
}
}
int xOGGStreamSource::Open(xString path) {
int result;
_oggfile = xOpenFile(path, "rb");
if (_oggfile.Buffer == NULL) {
xLogf("Audio", "Error in OGG File '%s', file does not exist.", path);
return -3;
}
if (result = ov_open(_oggfile.Buffer, &_oggstream, NULL, 0) < 0) {
xLogf("Audio", "Error in OGG File '%s', file is non-OGG.", path);
xCloseFile(_oggfile);
return -2;
}
_vorbisinfo = ov_info(&_oggstream, -1);
_vorbiscomment = ov_comment(&_oggstream, -1);
if (_vorbisinfo->channels == 1)
_format = AL_FORMAT_MONO16;
else
_format = AL_FORMAT_STEREO16;
alGenBuffers(2, _buffers);
alGenSources(1, &_source);
return 1;
}
void xOGGStreamSource::Close() {
alSourceStop(_source);
_empty();
alDeleteSources(1, &_source);
alDeleteBuffers(1, _buffers);
ov_clear(&_oggstream);
}
int xOGGStreamSource::Playback() {
if (Playing()) return 1;
if (!_stream(_buffers[0])) return 0;
if (!_stream(_buffers[1])) return 0;
alSourceQueueBuffers(_source, 2, _buffers);
alSourcePlay(_source);
return 1;
}
int xOGGStreamSource::Playing() {
ALenum state;
alGetSourcei(_source, AL_SOURCE_STATE, &state);
return (state == AL_PLAYING);
}
int xOGGStreamSource::Update(xVec3f_t Pos, xVec3f_t Vloc, xVec3f_t Dir, float Vol) {
int processed;
int active = 1;
alSource3f(_source, AL_POSITION, Pos.X, Pos.Y, Pos.Z);
alSource3f(_source, AL_VELOCITY, Vloc.X, Vloc.Y, Vloc.Z);
alSource3f(_source, AL_DIRECTION, Dir.X, Dir.Y, Dir.Z);
alSourcef (_source, AL_GAIN, Vol);
alSourcei (_source, AL_SOURCE_RELATIVE, AL_TRUE);
alGetSourcei(_source, AL_BUFFERS_PROCESSED, &processed);
while(processed--) {
ALuint Buffer;
alSourceUnqueueBuffers(_source, 1, &Buffer);
active = _stream(Buffer);
alSourceQueueBuffers(_source, 1, &Buffer);
}
return active;
}
xSound::xSound(xOGGStreamSource xss) { _source = xss; }
int xSound::PlaySound(float Volume, xVec3f_t Location) {
if (!_source.Playback()) return -3;
while(_source.Update(Location, xVec3f_t(0,0,0), xVec3f_t(0,0,0), Volume)) {
if (!_source.Playing()) {
if (!_source.Playback()) return -2;
else return -1;
}
}
_source.Close();
return 1;
}
xSoundManager::xSoundManager(){}
int xSoundManager::Init() {
_device = alcOpenDevice(NULL);
if (!_device) return -2;
_context = alcCreateContext(_device, NULL);
if (alcMakeContextCurrent(_context) == ALC_FALSE || !_context) return -1;
if (!Volume) {
xLogf("Error", "Volume in Audio is not set properly. Setting to default");
Volume = DEFAULT_VOLUME;
}
alListenerf(AL_GAIN, Volume);
if (!BufferSize) {
xLogf("Error", "Buffer size in Audio is not set properly. Setting to default");
BufferSize = DEFAULT_BUFFER_SIZE;
}
return 0;
}
xSound* xSoundManager::LoadOGG(xString file) {
xOGGStreamSource ogg;
if (ogg.Open(file) < 0) return NULL;
return new xSound(ogg);
}
xTechLibTest : main.cc
int main() {
xSetLogFile("xTechLibTest.log");
xSoundManager* audio = new xSoundManager();
if (audio->Init() < 0) return -1;
xSound* testsound1 = audio->LoadOGG("testsound.ogg");
if (testsound1 == NULL) return -2;
testsound1->PlaySound(1.0, xVec3f_t(1.0,0.5,0.3));
}
The above code and everything associated with it (string implementations, etc) work fine, no problems at all. That is until I include SDL.h; I get undefined references for every function I defined, when the compiler could find them with no problem before. It seems that the mere inclusion of SDL.h completely nullifies any definition I make. Any ideas what's going on here?
Have you properly included the linkage to the SDL libraries?
If you have built the binaries yourself, you need to include the path and library. On a linux system, if you have built the static libraries yourself, you will have a binary called libSDL2.a, however to link you need to specify SDL2 as your linked library.
Also as a side note, do you have a redundant include guard on your xsound.h file( via #ifdef _xsound_ ... ) ?
p.s. It will help the other users if you specify what how your environment is setup; compiler, system os, IDE.
It would be useful to see the output from your compiler/linker.
I've had similar problems with network related code when using Cygwin on a windows machine. I've had sockets working fine without SDL, as soon as I include SDL, the whole lot breaks with messages saying that certain header files and references can't be found.
I'm not certain, but I think it has something to do with the way that SDL has it's own main macros (here is a post about it here - simple tcp echo program not working when SDL included?).
I may be wrong, but is this similar to what you are seeing?
My English is not very good (im from Chile) but will try to explain in the best way possible (+ google translator :P)
well im working in Microsoft Visual C++ 2010 express and I need to migrate my opencv code to Linux to work on a rapsberry
Here the code:
#include "StdAfx.h"
#include <opencv2\core\core.hpp>
#include <opencv2\highgui\highgui.hpp>
#include <opencv\cv.h>
//#include <iostream>
using namespace cv;
int main( int argc, char** argv )
{
//Variable
CvCapture* capture = 0;
IplImage* frame = 0;
IplImage* frame_black = 0;
IplImage* frame_blue = 0;
IplImage* frame_red = 0;
//IplImage* red_gray = 0;
//Verifica Camara
capture = cvCaptureFromCAM(1);
if( !cvGrabFrame( capture )){
printf("error cámara");
exit(0);
}
//Comienza
for(;;){
// Captura imagen from camara
frame = cvQueryFrame(capture);
if( !frame ) break;
// filtro negro
frame_black = cvCreateImage(cvGetSize(frame),8,3);
CvScalar r,g;
for(int i=0;i<(frame->height);i++){
for(int j=0;j<(frame->width);j++){
r=cvGet2D(frame,i,j);
if((r.val[2]<80)&&(r.val[1]<80)&&(r.val[0]<80)){
g.val[2]=0;
g.val[1]=0;
g.val[0]=0;
cvSet2D(frame_black,i,j,g);
}
else{
g.val[2]=255;
g.val[1]=255;
g.val[0]=255;
cvSet2D(frame_black,i,j,g);
}
}
}
// filtro azul
frame_blue = cvCreateImage(cvGetSize(frame),8,3);
CvScalar s,c;
for(int i=0;i<(frame->height);i++){
for(int j=0;j<(frame->width);j++){
s=cvGet2D(frame,i,j);
if((s.val[2]<100)&&(s.val[1]<100)&&(s.val[0]>100)){
c.val[2]=0;
c.val[1]=0;
c.val[0]=255;
cvSet2D(frame_blue,i,j,c);
}
else{
c.val[2]=255;
c.val[1]=255;
c.val[0]=255;
cvSet2D(frame_blue,i,j,c);
}
}
}
// filtro rojo
frame_red = cvCreateImage(cvGetSize(frame),8,3);
CvScalar p,q;
for(int i=0;i<(frame->height);i++){
for(int j=0;j<(frame->width);j++){
p=cvGet2D(frame,i,j);
if((p.val[2]>100)&&(p.val[1]<100)&&(p.val[0]<100)){
q.val[2]=255;
q.val[1]=0;
q.val[0]=0;
cvSet2D(frame_red,i,j,q);
}
else{
q.val[2]=255;
q.val[1]=255;
q.val[0]=255;
cvSet2D(frame_red,i,j,q);
}
}
}
/* filtro hough
red_gray = cvCreateImage(cvGetSize(frame),8,1);
cvCvtColor( frame_red, red_gray, CV_BGR2GRAY);
cvSmooth(red_gray, red_gray, CV_BLUR,3);
CvMemStorage* storage_var = cvCreateMemStorage(0);
CvSeq* results = cvHoughCircles(red_gray, storage_var , CV_HOUGH_GRADIENT , 2, red_gray->height/3 );
// reemplaza
for( int i = 0; i < results->total; i++ ){
float* p = (float*) cvGetSeqElem( results, i );
CvPoint pt = cvPoint( cvRound( p[0] ), cvRound( p[1] ));
cvCircle(red_gray,pt,cvRound( p[2] ),cvScalar(0,0,255),1.8);
}
*/
// mostrar en ventana
cvShowImage("ventana",frame_black);
if( cvWaitKey( 10 ) >= 0 )
break;
}
//Libera de memoria
cvReleaseCapture( &capture);
cvReleaseImage( &frame);
cvReleaseImage( &frame_black);
cvReleaseImage( &frame_blue);
cvReleaseImage( &frame_red);
//cvReleaseImage( &red_gray);
return 0;
}
copying and pasting the code into a file "codigo.c" and compiling (in linux terminal) with
gcc codigo.c -o codigo $(pkg-config --cflags --libs opencv)
I have the following error
codigo.c:3:21 fatal error: StdAfx.h: No such file or directory
compilation terminated.
well, google told me that StdAfx.h is a header of microsoft visual c++
and here i crash :l
i dont know what can i do now
I hope someone can tell me some way to go to fix this problem
thx to all
As your code does not depend on anything other than opencv, you can just leave out the stdafx header. it's a feature of visual studio that you dont need here.
( see Purpose of stdafx.h )
it compiles fine on my machine. with:
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv/cv.h>
note the "/". please use these instead of backslashes here, or unix machines will complain.
also: use g++ to compile this code, not gcc.
I am trying to put number of frames which are taken from a video in a loop.I want to display that frames in sequence an after that I want to subtract it using opencv 2.3.
My problem is that I am not able to know where function is not called.
here is my code below:
using namespace cv;
void loadImage(IplImage *image, int number)
{
// Store path to directory
char filename[100];
strcpy(filename, "S:\FINAL PROJECT ABSTRACT\images 1");
char *frame;
// Convert integer to char
char frameNo[10];
//sprintf(frame, "%0.3i", number);
// Combine to generate path
strcat(filename, frameNo);
strcat(filename, ".jpg");
// Use path to load image
image = cvLoadImage(filename);
}
int _tmain(int argc, _TCHAR* argv[]){
IplImage *im=0;
int nImages = 6;
for (int i = 0; i < nImages; ++i)
{
loadImage(im, i);
char filename[100];
strcpy(filename, "images 1");
char frameNo[10];
sprintf(frameNo, "%03i", i);
strcat(filename, frameNo);
strcat(filename, ".jpg");
IplImage *im = cvLoadImage(filename,CV_LOAD_IMAGE_COLOR);
cvNamedWindow("pic");
cvShowImage("pic",im);
cvWaitKey();
}
}
//}
I am not getting any error in build.bt while debugging it shows:-
Unhandled exception at 0x77db15de in loop of frames.exe: 0xC0000005: Access violation.
At
strcat(filename, frameNo);
strcat(filename, ".jpg");
this point some error is there..
Your string handling is pretty confused. It's not clear exactly what path you're trying to generate.
You can replace most of your path generation with a single sprintf()
char filename[100];
sprintf(filename, "S:\\FINAL PROJECT ABSTRACT\\images 1%03i.jpg",number);
image = cvLoadImage(filename);
(100 chars seems somewhat arbitrary - and potentially a bit short)
No idea if that's the right string for your image paths, you were trying to insert a '.' in there, so I don't know what your real file paths look like.
However having loaded the image inside the loadImage() function, you then seem to do the exact same thing in main() (throw away the image you've just loaded, generate another path, and then load that instead). So I doubt this is going to work even when you fix the string handling.